Furnace



(No Model.) 2 Sheets-Sheet l.

H. LANG.

FURNAGE.

No. 581,596. Patented Apr. 27, 1897.

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2 Sheets-Sheet 2. H. LANG.

PURNAGE (No Model) No. 581,596. Patented Apr. 27, 1897.

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IlNiTnn STATES FATnNT Crrrcn.

HERBERT LANG, OF OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-IIALF TO THERISDON IRON AND LOCOMOTIVE IVORKS, OF SAN FRANCISCO,

CALIFORNIA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 581,596, dated April27, 1897.

Application filed July 9,1896. Serial No. 598,603. (No model.)

To @ZZ whom t mfr/jl) con@ Be it known that I, HERBERT LANG, a citizenof the United States, residing at Oakland, county of Alameda, and Stateof California, have invented certain new and useful Improvements inFurnaces; and I hereby declare the following to be a full, clear, andexact description of the same, reference being had to the accompanyingdrawings, forming a part of this specification.

My invention relates to furnaces for smelting mineral ores, such assilver, gold, lead, copper, nickel, and the like, and to an improvedconstruction of such furnaces coniprising various features to behereinafter explained.

My improvements consist in a compact arrangement of the parts wherebyall the various elements are brought within the contour of the main bodyof the furnace g in employing the legs or supports of the furnace asconduits for air and water, dispensing with external pipes below thefurnace; in constituting the wind-box an integral and structural memberof the furnace and its framing; in dispensing with all obstructionbeneath and around the furnace except its main supporting-legs,constructing the water-jacket in separate removable sections, and in themanner of attaching the same and of circulating water therein 5 in amethod of supporting the furnace-bottom by means of girders attached tothe wind-box; in the method of constructing the twyer-pipes to controlthe blast, and in other fea-tures that will be pointed out in connectionwith the drawings and set forth in the claims at the end of thisspecification.

The objects of my invention are to render smelting-furnaces for mineralsmore compact, convenient, and durable; also, to simplify theirconstruction and the renewal of such parts as are subject to wear orerosion by heat.

Referring to the drawings, Figure l is a transverse central sectionthrough a smelting-furnace constructed according to my invention. Fig. 2is a longitudinal central section through the same furnace. Fig. 3 is anelevation in perspective of the same furnace.

Fig 4 is a perspective view of a unit or section of the water-jacket.Fig. 5 is a detail showing the manner of connecting the waterjacketsections to the interior of the furnace. Fig. G is another detail viewshowing a section of the wind-box with the ledges or lugs for attachingthe water-jacket thereto.

Similar letters of reference indicate correspending parts throughout.

The furnace as a whole is supported on the legs A A2 A3 A4.

B is the shaft orfurnace proper, and C the bottom or hearth as arrangedfor smelting copper ores, both the metal and the slag flowing off at'thespout C2.

Air or blast from some suitable apparatus is delivered through the pipeE, placed underground, connecting to the hollow leg A of the furnace,passing upward through this leg A and to the right and left in thewind-box D, extending to all sides of the furnace B, supplying thetwyers F' through the pipes F2 and the perforations a, as seen in Fig.5. These twyer-pipes are composed of an outer tube F2, expanded andrigidly fastened in the sides of the wind-box D, and a movable innertube or shell F3, that slides outward and inward to regulate or closethe apertures a and thus control the blast as is required. To the outerend of this sliding tube F3 is attached the usual cap and sight-hole atG, through which the charge in the furnace can be examined when thefurnace is in operation.

The wind box or receiver D extends each way from the leg A to the leg A2and constitutes the main girders, on which rest all the elements of thefurnace above that plane, including the refractory walls J, platform K,and chimney L, also the waterjacket I, as seen in the sections Figs. land 2. The waterjacket is composedof a series of hollow sections I, asseen in Figs. 4 and 5, provided with twyers F, and are attached to theinside of the Wind-box D by means of the dovetail ledges l), that iitinto corresponding ledges c on the inner .face of the Wind-box D, asseen in Figs. 5 and 6. These ledges h and c are not continuous, but intwo parts, so that when the units or sections I are raised so the ledgesZ) disengage those marked c on the wind-box D these sections I can bemoved inward, taken out, and replaced in case of their IOO .to theplates Q, as seen in Figs. l and 3.

being fractured or injured. To raise and remove these sections I,aportion of themasonry J is cut away at the top, and after replacing thesection the cavity thus cut away is filled with ganister or clay, so asto preserve a smooth inner face for the furnace.

To preserve the water jacket sections I from the intense heat in theshaft B, they are made hollow, as seen in the section Fig. 5, and areprovided at or near the top with inlet and outlet ways O to receive thepipes M' M2, as seen in'Figs. 1 and 2, the water being supplied throughthe underground pipe M4, that passes up through the interior of the legA2 and connects to the horizontal supply-pipe M3, that extends allaround thefurnace, as seen in Fig. 3. From this pipe M3 short pipes Mextend downward and connect to each of the sections I of thewater-jacket, stop-cocks N being provided to regulate the amount andshut off the water in case the water-jacket is broken and when thefurnace is out of use.

The cool water entering the sections I of the water-jacket sinks to thebottom and the heated water rises to the top, flowing off through thepipes M2 into a trough and then down a d1ain-pipeM5,i11closed inthefurnaceleg A2, .as indicated by dotted lines in Fig. 2, all exposedpipes for both supply and waste being placedabove the wind-box Dandsightway at G orvabove the chamber B of the furnace, out of the way ofthe attendants, and offering no obstruction at the floor-level.

Around the `masonry J, I place a covering of metal plates Q, that reston the wind-box D and form flush surface and supporton all sides of thefurnace up to the platform-girders R. These girders R are `two in numberat each side, one `resting on the top of the plates Q and the other onbrackets S, bolted The chimney L is attached to the platform K orfastened in anysuitable manner, and is 4provided with a charging-door atT, through which fuel, ore, and fluxes are supplied to the furnace inthe usual manner.

The height or 'length of the water-jacket sections I, the masonry J, andchimney K are arranged to suit thepurposes to which the Vfurnace isapplied, these elements being foreshortened in the drawings to rendertheir relation and connections more clear.

The furnace bottom or hearth C is supported by the bent girders U, heldby the bolts V, passing through the lugs W on the windbox D, asseen inFigs. l and 3. This .permits easy removal and replacing of the bottom orhearth C in cleaning and to give access to the furnace or for any otherpurpose.

The wind-box D extends wholly around the furnace except the spaceoccupied bythe legs A A2, the former communicating each way for theblast to the leg A2, which forms a conduit for the supply and drainpipes M* M5, as 'before explained. In this manner it will be seen thatfrom the ground or floor line Y up to the wind-box D the furnace-legsare the only members that occupy7 this plane or offer obstruction :andthat the wind-box D forms the next section of the furnace, acting as aconduit or receiver and also as a girder to receive the masonry J andthe covering Q, the whole being parallel on the outer face andsymmetrical, also providing strength and solidity to the wholestructure, saving space and contributing to the convenience ofconstructing and operating the furnace. It will also be seen that thewater-jacket sections I, the bottom C', the masonry J, also the wind andwater fittings, can all of them be removed and replaced wit-houtderanging or disturbing other parts inj uriously and in a short time.

Having thus described the nature and objects of my invention and themanner of constructing and operating the same, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a smelting-furnace, a plurality of hollow box-formed legs orsupports, one or more of which connects with an air-inletand serves as awind-conduit, a wind-box supported directly upon and over the said legsand communicatin g with the said wind-conduits, and a refractory walllocated upon and supported by the said wind-box, substantially asspecified.

2. In a slnelting-furnace, a plurality of hollow box-formed legs orsupports, one or more of which connects with an air-inlet below thefloor-level and serves as a conduit for wind supplied thereto, awind-box supported directly upon the said legs and in communication withthe said wind-conduits, and a refractory Wall upon and supported by thesaid wind-box, substantially as specified.

3. In a smelting-furnace, a plurality of hollow box-formed legs orsupports to sustain the furnace, arranged respectively as conduits forwind, and for water-pipes, said legs being provided with inlet-waysbelow the Hoor-level, and respectively communicating with the wind andwater supply con uections to the furnace appurtenances at and above thetwyers, substantially as specified.

4L. In a smelting-furnace, a plurality of boxformed legs or supports,one or more of which connects with an air-inlet and serves as awindconduit, a continuous wind-box of angular cross-section supportedupon the said legs surrounding the lower part of the furnace on allsides, provided with twyers and twyerpipes, and suitable connectionsbetween the same and the wind-box, said wind-box being in communicationwith the said wind-conduits, and a refractory wall upon and supported bythe said wind-box, substantially as specified.

5. In a smelting-furnace, a hollow continuous girder and wind-box ofangular crosssection surrounding the lower part of the same on all sidesand supporting the furnace, in combination with hollow box-formed legson which the said hollow girder and wind-box rests, and by which it issupported, and airpassages to the wind-box through one or more of thesaid hollow legs, substantially as specilied.

G. In a smelting-furnace, a hollow continuous girder and wind-box ofangular crosssection surrounding the lower part of the same on all sidesand supporting the furnace, hollow legs directly under and supportingthe said wind-box, air-passages to the said windboX through one or moreof the said hollow legs, and twyers and twyer-pipes located in the saidwind-box, composed of iiXed and movable tubes respectively, one withinthe other, the iixed tubes being perforated to admit air from thewind-box in graduated supply dependent on the position of the movabletubes, substantially as speciiied.

7. In a smelting-furnace, a plurality of hollow box-formed legs orsupports, one or more of which connects with an air-inlet and serves asa wind-conduit, in combination with a wind-box of angular cross-sectionsupported directly upon and over said hollow legs and in communicationwith the said wind-conduits, a refractory wall located upon andsupported by the wind-box, said wind-box being provided with twyers andtwyer-pipes one within the other respectively, the outer pipe or twyerbeing fixed in the outer and inner sides of the wind-box and passingthrough the same, and perforated, and the inner pipe being movablewithin the outer pipe, whereby the perforations in the latter may becovered and uncovered at will, and the supply of air to the twyer fromthe wind-box thus controlled and regulated, substantially as specitied.

8. In a smelting-furnace, a hollow continuous girder and wind-box Ofangular crosssection surrounding the lower part of the same on all sidesand supporting the furnace, flush with the walls thereof on the outerfaces, in combination with a water-jacket removably sustained on theinside of the said girder and wind-box, and means for supplying air tothe said wind-box, substantially as specified.

9. In a smelting-furnace, a hollow continu ous girder and windeboxsurrounding the lower part of the furnace and supporting the same, incombination with a water-jacket forming the inner wall of the furnace,composed of independent hollow sections removably sustained on the innerface of the said girder and wind-box, and means for supplying air to thesaid wind-box, substantially as specified.

l0. In a s1neltingf1nnace,a water-jacket composed of independent hollowsections provided with dovetail ledges on their outer 'vided on itsinner face or wall with corresponding dovetail recesses, whereby thesaid sections are removably attached to the said wind-box, substantiallyas specified.

l1. In a smelting-furnace, in combination with a wind-box surroundingthe same, a water-jacket composed of independent hollow sectionsattaehable to and removable inwardly from the said wind-box, providedwith twyers at the bottom and water inlets and outlets at the top,substantially as and for the purpose specified.

l2. In a smelting-furnace, in combination with a wind-box surroundingthe same, a water-jacket composed of independent hollow sectionsremovablyattached to the inner wall of the said wind-box, provided withtwyers, and a watersupply pipe extending around the furnace above thetwyers, with pipe connections from the said main supply-pipe to the saidsections, provided with cocks whereby the water-supply is regulated,substan tially as and for the' purpose specified.

13. In asmelting-furnace, ahollow continuous girder and wind-boxsurrounding the lower part of the furnace and supporting the same, withmeans for supplying air to the said wind-box, in combination with asectional water-jacket furnace-lining connected thereto, superimposedmasonry forming the upper portion of the shaft sustained upon the saidgirder and wind-box, and sustainingplates located upon the exterior ofthe said masonry, iiush with the girder and wind-box on the outer facethereof, substantially asv and for the purpose specified.

lei. In a smelting-furnace, the combination of the hollowsupporting-legs one or more of which connects with an air-inlet andforms a wind-conduit, the girder and wind-box located thereon, saidwind-box connecting with said wind-conduit, the water-jacket sectionssupported on the inner face of the girder and wind-box, the masonry wallsustained upon the said girder and wind-box, flush on the inside withthe inner face of the water-jacket A sections, and the outercovering-plates borne upon the outer face of the said masonry Wall,flush with the outer face of the girder and wind-box, allsubstantiallyas and for the purpose specified.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses.

HERBERT I JANG.

IVi tnesses:

THos. J. BARBOUR, JAMES L. KING.

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